[enidad2]

When rebuilding Calibre library, it detected that several books had the same IDs. The first one was added and the others ignored. This was caused by incorrect merging of libraries - copied library folders into Calibre and ran rebuild. Now I have a mess.
Tried exporting the books so I could then clear the library and reimport, but there is no individual book option. Exporting the entire library gives 2 large files that I'm afraid to modify.

I can always just copy each book from its folder, but would lose the metadata.

Is there a renumbering tool that could be run against the books and then rebuild the library or (even better) a resequence option during rebuild?

Thanks,